Production of dyestuff emulsion and of color lake therefrom



Patented can mass inm'us eonnncxn, or. v manna nanannm.

I IANCHESTEB, GLAND, ASSIGNOZ '10 Q1 HLRPLE, ENGLAND.

PRODUCTION Or DYESTUI'F EMULSIOTI AND OF COLOR TEEBII'BOI.

No Drawing. Application filed This invention has for its object .to provvide a new orimproved simple and economical process; for the productionemulsions or colloidal suspensions or 001- 5 loidal solutions ofdyestuffs.

The invention comprises the production of a'colloidal emulsion,suspension or I of dyestufl's from the dyestuif, a solvent for thedyestufi and a material 1 not a solvent for the dyestufi or'which doesnotmix with the solvent'for the dyestufi, but which when worked togetherwith the dyestufit' and. solvent. is capable-of maintaining them in theform loidal suspension, or a colloidal solution.

The invention further comprises the production of a colloidal emulsion,suspension or solution of dyestuif dyestufi', a solvent for thedyestuff, insuificient in quantity to dissolve the whole of the Ydyestuff, and a material which is either not a solvent for the dyestufi'or which does not mix with the solvent for the dyestufi, but

' which when worked together with the dyestuff and solvent is capable ofmaintaining them in the form of an emulsion or a colloidal suspension,or a colloidal solution.

The solvent for the dyestufi is usually water but other materials may beused, suc

' as alcohols,

the char'acter'of the'dyestufi and the working it has to undergo.Mixtures of mate- 5 rials may also be employed. The proportions of thematerials are mot fixed or limited, but for normal services, the'weightof the solvent may be equal to or up to twice v the weight of thedyestuii. Most, if not all, 40 of the dyestufis of commercial qualityare not soluble in such a small uantity of solvent, and in this processw en using sue dyestuffs, the uantity of solvent employed should be insuqient to of the dyestufl' my invention,-

at normal temperature; With 5 however, I 'find it advantageous andeconomical to employ instead of the commercial dyestufl, the .dyestufl.in its most soluble form or'a supersaturated solu tion of the dyestufi,examples being the chlorides or brilliant .greenand malachite 4 green.

The third materi al serves to maintain the dyestufi' and the solvent forthe dyestufl' or the dyestufl solution in the form of a colloidalsuspension and must therefore be of colloidal solution which is eitherof an emulsion or a colfrom a commercial acids, and alkalies accordingto form a real solution Ka a, 1e25, sm'ai No. 28,958, and in' Great mumAugust 10,1024.

either non-solvent of the dyestufi or not miscible with the solvent forthe dyestufi. For convenience of reference this third material ishereafter termed a protective agent. musteither be a colloidal body or amaterial which forms .a colloidal suspension or colloidal solutionduring the process hereinafter described. ples of materials which may beemployed Oil, fat, mineral oil, waterglass, soap, trin, starch, glue,minerals .1n colloidal state and mixtures thereof. Minerals of crystal-'line structure are not suitable' The three components,

and non-solvent material are worked up in a suitable machine until anemulsion or a V colloidal suspension or a is produced. Generally, highspeed COllOld mills or emulsifiers are more eflicient forthe purposethan slow speedmills. 'If the emulsion of colloidal suspensionisproperly made,

colloidal solution dex- The following are examdyestufl, solvent it willremain unchanged for a long period and whilst it may separate out-if notproperly produced, further working in the mill with or without theadditional material will restore the emulslon or colloidal suspension.If the emulsion or colloidal suspension is used for makin pi ment colorsor color lakes, then the act t or colloidal suspension been allowed to,it would have separated out, will have no efiect on the properties ofthe pigment colour once it is produced.

The emulsion -or colloidal suspension or colloidal solution of thedyestufl may be used for dyeing, calico printin or lake making. -Pastescan be produced myrocess of high concentration and wit out t e emat hadsuch emulsion ploymentof heat even for 'dy'estufis of very 1 hlittlesolubility.

If the emulsions or colloidal suspensions tion with suitable substrata,such as green or colloidal solutions be utilized in comhlnaearth, whiteearth, and the like for the reductionofpigment colors, then it wil befound that aftemworking the emulsion and the substratum in the usualway,.the ignient color is practically or perfectl ry. The colors: have amuch greater yiel ingor staining capacity and Esamplea.

give very pure shades. I

- and 1 lb. of castor oil.

lb. of water and-2 lbs. of mineral oil and this emulsion is carefullyground in an edgerunner with 112 lbs. of green earth. A yellow bodycolor is produced which needs no drying. In place. of Auraniin. anyother basic dyestutl and in place of green earth any other fixing earth.may be used.

I (3) 5 lbs. Ponceau R (Schultz-Julius No. v

82) is emulsified with 3 lbs. of water, 2 lbs. soluble castor oil and 4ozs. dextrin. This emulsion is suitable for dyeing, printing andlakemaking. In place of Ponceau any other acid color may be used. Formaking body colors, 112 lbs. barytes is ground very serviceable as a 41.1b. Brilliant Green (Schultz-Julius No. 499) base is transformed intothe chloride with the requisite exact amount of hydrochloric acid andbrought up to 2 lbs. with water. To this 2 lbs. mineral oil is added.The mixture is-emulsified in a colloid mill.

l. A method for the production of a colloidal dispersion of a dyestufl'which comprises colloidally dispersing said 'dyestiitf .in a quantity ofsolvent therefor insuificient to dissolve the whole of said dyestuff andin the presence of a substance-adapted to act as a protective agent forsaid dispersion.

As an article .of manufacture, a colloidal dispersion of a dyestufl',comprising a cient in quantity to dissolve said dyestufl', and aprotective agent for said dispersion. In testimony whereof. I havesigned my name to this specification. CARL ERNEST JULIUS GOEDECKE.

